Two-quasiparticle-plus-rotor model calculations ofKr76,78,80

1982 ◽  
Vol 25 (6) ◽  
pp. 2983-2989 ◽  
Author(s):  
R. Soundranayagam ◽  
S. Ramavataram ◽  
A. V. Ramayya ◽  
J. H. Hamilton ◽  
R. L. Robinson
Keyword(s):  
Model Calculations ◽  
Rotor Model

Rotational structure of highly deformedY99: Particle-rotor model calculations

1985 ◽  
Vol 31 (2) ◽  
pp. 634-645 ◽  
Author(s):  
F. K. Wohn ◽  
John C. Hill ◽  
R. F. Petry
Keyword(s):  
Rotational Structure ◽  
Model Calculations ◽  
Rotor Model

Particle–rotor model interpretation of rotational features in 125I

2012 ◽  
Vol 90 (5) ◽  
pp. 413-424 ◽  
Author(s):  
Sadek Zeghib
Keyword(s):  
Negative Parity ◽  
Rotational Structure ◽  
Hole State ◽  
Model Calculations ◽  
Model Interpretation ◽  
First Time ◽  
Rotor Model

Most of the structure of 125I at low and medium energies has been successfully interpreted using a particle–rotor model. Rotational features similar to complete particle–core rotational multiplets have been identified for the first time especially for g7/2, d5/2 proton–particle orbitals. The model calculations show also that the rotational structure of the ΔJ = 1 band build on unusually low-lying g9/2 proton-hole state (9/2+ [404]) is naturally very well predicted and successfully described as well as other rotational features for negative parity states of h11/2 parentage along with the different observed ΔJ = 2 bands. Experimental energies and transition properties of previously observed positive and negative parity states of 125I, have been compared to those predicted by the model calculations considering a moderately deformed rotor.

Particle-rotor-model calculations in 125I

Pramana ◽  
2001 ◽  
Vol 57 (1) ◽  
pp. 171-174 ◽  
Author(s):  
Hariprakash Sharma ◽  
B Sethi ◽  
P Banerjee ◽  
Ranjana Goswami ◽  
RK Bhandari ◽  
...  
Keyword(s):  
Model Calculations ◽  
Rotor Model

105Tc nuclear structure and systematic evolution of states of 1/2+[431] intruder band in odd-A 95, 97,99,101,103,105,107Tc isotopes

2020 ◽  
Author(s):  
Sadek ZEGHIB
Keyword(s):  
Experimental Investigation ◽  
Fermi Level ◽  
Nuclear Structure ◽  
Rotational Model ◽  
Model Calculations ◽  
Rotational Bands ◽  
Systematic Evolution ◽  
Intruder Orbital ◽  
Model Transition ◽  
Rotor Model

Previously observed negative and positive parity states of <sup>105</sup>Tc were studied in the framework of particle-rotor model. Transition properties and experimental energies were compared to the predictions of the model calculations. A systematic study of the evolution of the intruder π1/2+[413] band in the nuclear structure of odd-A Technetium isotopes <sup>95,97,99,101,103,105,107</sup>Tc is presented as well. The existence of this intruder band has been argued previously in <sup>95,97,99,101,103</sup>Tc isotopes (partially populated) and fully observed and confirmed in <sup>105</sup>Tc. It will be shown that changes in deformation and subsequently the position of Fermi level vis a vis the 1/2+[431] intruder orbital originating from the π (d<sub>5/2</sub>, g<sub>7/2</sub>) subshells predominantly affect these systematic changes. All four interpreted experimental rotational bands are naturally predicted by the rotational model as bands build on states of good Ω originating from 5/2+[422], 5/2-[303], 3/2-[301] and 1/2+[431] orbitals near the Fermi level in deformed <sup>105</sup>Tc (strong coupling). Further experimental investigation about missing data is needed for those observed low lying states in both <sup>105</sup>Tc and <sup>103</sup>Tc in order to confirm the presence of the 1/2-[301] rotational band that is well defined in lighter <sup>95,97,99,101</sup>Tc isotopes.

103Tc nuclear structure and systematic evolution of states of g9/2 parentage in odd-A 95, 97, 99, 101, 103Tc isotopes

2015 ◽  
Vol 93 (8) ◽  
pp. 862-870
Author(s):  
Sadek Zeghib
Keyword(s):  
Fermi Level ◽  
Nuclear Structure ◽  
Strong Coupling ◽  
Systematic Study ◽  
Negative Parity ◽  
Model Calculations ◽  
Rotational Bands ◽  
Complete Study ◽  
Systematic Evolution ◽  
Rotor Model

A systematic study of the evolution of the nuclear structure (at low and medium energies) of odd-A 95–103Tc isotopes is presented. These changes are indeed affected predominantly by changes in deformation and subsequently the position of the Fermi level. Hence a complete study of previously observed positive and negative parity states (at low and medium energies) of 103Tc in the framework of the particle–rotor model is performed. Experimental energies and transition properties will be compared to those predicted by the model calculations. The systematic model calculations show that those rotational “multiplets” emerging as a result of the larger Coriolis mixing, especially among positive-parity Nilsson states of g9/2 parentage in less deformed isotopes 95, 97, 99, 101Tc, are just as natural a prediction of the model as rotational bands built on states of good Ω in well deformed 103Tc (strong coupling) as confirmed experimentally.

Study of signature inversion in 123,125I using Particle Rotor Model calculations

2021 ◽  
pp. 2150062
Author(s):  
Umakant Lamani ◽  
Pragya Das ◽  
S. G. Wahid
Keyword(s):  
Transition Probabilities ◽  
Nuclear Shape ◽  
Positive Parity ◽  
Model Calculations ◽  
Signature Inversion ◽  
Reduced Transition Probabilities ◽  
Rotor Model

The phenomenon of signature inversion in positive parity yrast states of [Formula: see text]I nuclei has been studied using the Particle Rotor Model (PRM) calculations. The experimentally observed signature inversion is well reproduced from the PRM calculations. The change in the value of a triaxial parameter [Formula: see text] was observed after the inversion. The PRM calculations were also used to describe the reduced transition probabilities. The derived change in the value of “[Formula: see text]” (in Lund convention) after inversion is interpreted as the change in nuclear shape from near triaxial to tending towards noncollective oblate.

Effects of Ambipolar Diffusion on Prominence Thread Models

1994 ◽  
Vol 144 ◽  
pp. 315-321 ◽  
Author(s):  
M. G. Rovira ◽  
J. M. Fontenla ◽  
J.-C. Vial ◽  
P. Gouttebroze
Keyword(s):  
Energy Balance ◽  
Transition Region ◽  
Ambipolar Diffusion ◽  
Line Profiles ◽  
Balance Equations ◽  
Model Calculations ◽  
Partial Frequency ◽  
Frequency Redistribution ◽  
Partial Frequency Redistribution ◽  
Theoretical Structure

AbstractWe have improved previous model calculations of the prominence-corona transition region including the effect of the ambipolar diffusion in the statistical equilibrium and energy balance equations. We show its influence on the different parameters that characterize the resulting prominence theoretical structure. We take into account the effect of the partial frequency redistribution (PRD) in the line profiles and total intensities calculations.

Influence of stable iodine on the uptake of the thyroid – model vs. experiment

2001 ◽  
Vol 40 (01) ◽  
pp. 31-37 ◽  
Author(s):  
U. Wellner ◽  
E. Voth ◽  
H. Schicha ◽  
K. Weber
Keyword(s):  
Time Course ◽  
Compartment Model ◽  
The Body ◽  
Iodine Uptake ◽  
Model Calculations ◽  
Physiological Conditions ◽  
Iodine Supply ◽  
Predicted Values ◽  
The Individual ◽  
Stable Iodine

Summary Aim: The influence of physiological and pharmacological amounts of iodine on the uptake of radioiodine in the thyroid was examined in a 4-compartment model. This model allows equations to be derived describing the distribution of tracer iodine as a function of time. The aim of the study was to compare the predictions of the model with experimental data. Methods: Five euthyroid persons received stable iodine (200 μg, 10 mg). 1-123-uptake into the thyroid was measured with the Nal (Tl)-detector of a body counter under physiological conditions and after application of each dose of additional iodine. Actual measurements and predicted values were compared, taking into account the individual iodine supply as estimated from the thyroid uptake under physiological conditions and data from the literature. Results: Thyroid iodine uptake decreased from 80% under physiological conditions to 50% in individuals with very low iodine supply (15 μg/d) (n = 2). The uptake calculated from the model was 36%. Iodine uptake into the thyroid did not decrease in individuals with typical iodine supply, i.e. for Cologne 65-85 μg/d (n = 3). After application of 10 mg of stable iodine, uptake into the thyroid decreased in all individuals to about 5%, in accordance with the model calculations. Conclusion: Comparison of theoretical predictions with the measured values demonstrated that the model tested is well suited for describing the time course of iodine distribution and uptake within the body. It can now be used to study aspects of iodine metabolism relevant to the pharmacological administration of iodine which cannot be investigated experimentally in humans for ethical and technical reasons.

Sign in / Sign up

Export Citation Format

Share Document